228632447628 has 72 divisors (see below), whose sum is σ = 625516164000. Its totient is φ = 69994907136.

The previous prime is 228632447627. The next prime is 228632447677. The reversal of 228632447628 is 826744236822.

228632447628 is a `hidden beast` number, since 2 + 2 + 8 + 6 + 3 + 2 + 4 + 4 + 7 + 628 = 666.

228632447628 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×228632447628² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (228632447621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1134333 + ... + 1320596.

It is an arithmetic number, because the mean of its divisors is an integer number (8687724500).

Almost surely, 2^228632447628 is an apocalyptic number.

It is an amenable number.

228632447628 is an abundant number, since it is smaller than the sum of its proper divisors (396883716372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228632447628 is a wasteful number, since it uses less digits than its factorization.

228632447628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2455151 (or 2455146 counting only the distinct ones).

The product of its digits is 12386304, while the sum is 54.

The spelling of 228632447628 in words is "two hundred twenty-eight billion, six hundred thirty-two million, four hundred forty-seven thousand, six hundred twenty-eight".